1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 18 * NO WARRANTY 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 24 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 27 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29 * THE POSSIBILITY OF SUCH DAMAGES. 30 */ 31#include <sys/param.h> 32#include <sys/module.h> 33#include <sys/kernel.h> 34#include <sys/systm.h> 35#include <sys/sysctl.h> 36#include <sys/mbuf.h> 37#include <sys/malloc.h> 38#include <sys/lock.h> 39#include <sys/mutex.h> 40#include <sys/proc.h> 41#include <sys/ucred.h> 42#include <sys/jail.h> 43 44#include <sys/sockio.h> 45#include <sys/socket.h> 46#include <sys/socketvar.h> 47#include <sys/errno.h> 48#include <sys/callout.h> 49#include <sys/endian.h> 50#include <sys/kthread.h> 51#include <sys/taskqueue.h> 52#include <sys/priv.h> 53#include <sys/sysctl.h> 54 55#include <machine/bus.h> 56 57#include <net/if.h> 58#include <net/if_dl.h> 59#include <net/if_media.h> 60#include <net/if_types.h> 61#include <net/if_arp.h> 62#include <net/ethernet.h> 63#include <net/if_llc.h> 64#include <net/vnet.h> 65 66#include <net80211/ieee80211_var.h> 67#include <net80211/ieee80211_regdomain.h> 68 69#include <net/bpf.h> 70 71#include <sys/errno.h> 72#include <sys/conf.h> /* cdevsw struct */ 73#include <sys/uio.h> /* uio struct */ 74 75#include <netinet/in.h> 76#include <netinet/if_ether.h> 77 78#include "if_wtapvar.h" 79#include "if_wtapioctl.h" 80#include "if_medium.h" 81#include "wtap_hal/hal.h" 82 83/* WTAP PLUGINS */ 84#include "plugins/visibility.h" 85 86MALLOC_DEFINE(M_WTAP, "wtap", "wtap wireless simulator"); 87MALLOC_DEFINE(M_WTAP_PACKET, "wtap packet", "wtap wireless simulator packet"); 88MALLOC_DEFINE(M_WTAP_RXBUF, "wtap rxbuf", 89 "wtap wireless simulator receive buffer"); 90MALLOC_DEFINE(M_WTAP_PLUGIN, "wtap plugin", "wtap wireless simulator plugin"); 91 92static struct wtap_hal *hal; 93 94/* Function prototypes */ 95static d_ioctl_t wtap_ioctl; 96 97static struct cdev *sdev; 98static struct cdevsw wtap_cdevsw = { 99 .d_version = D_VERSION, 100 .d_flags = 0, 101 .d_ioctl = wtap_ioctl, 102 .d_name = "wtapctl", 103}; 104 105int 106wtap_ioctl(struct cdev *dev, u_long cmd, caddr_t data, 107 int fflag, struct thread *td) 108{ 109 int error = 0; 110 111 CURVNET_SET(CRED_TO_VNET(curthread->td_ucred)); 112 113 switch(cmd) { 114 case WTAPIOCTLCRT: 115 if(new_wtap(hal, *(int *)data)) 116 error = EINVAL; 117 break; 118 case WTAPIOCTLDEL: 119 if(free_wtap(hal, *(int *)data)) 120 error = EINVAL; 121 break; 122 default: 123 DWTAP_PRINTF("Unknown WTAP IOCTL\n"); 124 error = EINVAL; 125 } 126 127 CURVNET_RESTORE(); 128 return error; 129} 130 131/* The function called at load/unload. */ 132static int 133event_handler(module_t module, int event, void *arg) 134{ 135 struct visibility_plugin *plugin; 136 int e = 0; /* Error, 0 for normal return status */ 137 138 switch (event) { 139 case MOD_LOAD: 140 sdev = make_dev(&wtap_cdevsw,0,UID_ROOT, 141 GID_WHEEL,0600,(const char *)"wtapctl"); 142 hal = (struct wtap_hal *)malloc(sizeof(struct wtap_hal), 143 M_WTAP, M_NOWAIT | M_ZERO); 144 145 init_hal(hal); 146 147 /* Setting up a simple plugin */ 148 plugin = (struct visibility_plugin *)malloc 149 (sizeof(struct visibility_plugin), M_WTAP_PLUGIN, 150 M_NOWAIT | M_ZERO); 151 plugin->base.wp_hal = hal; 152 plugin->base.init = visibility_init; 153 plugin->base.deinit = visibility_deinit; 154 plugin->base.work = visibility_work; 155 register_plugin(hal, (struct wtap_plugin *)plugin); 156 157 printf("Loaded wtap wireless simulator\n"); 158 break; 159 case MOD_UNLOAD: 160 destroy_dev(sdev); 161 deregister_plugin(hal); 162 deinit_hal(hal); 163 free(hal, M_WTAP); 164 printf("Unloading wtap wireless simulator\n"); 165 break; 166 default: 167 e = EOPNOTSUPP; /* Error, Operation Not Supported */ 168 break; 169 } 170 171 return(e); 172} 173 174/* The second argument of DECLARE_MODULE. */ 175static moduledata_t wtap_conf = { 176 "wtap", /* module name */ 177 event_handler, /* event handler */ 178 NULL /* extra data */ 179}; 180 181DECLARE_MODULE(wtap, wtap_conf, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 182MODULE_DEPEND(wtap, wlan, 1, 1, 1); /* 802.11 media layer */ 183